/*******************************************************************************
 * Copyright (c) 2008-2009 zhang yuexiang.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ 
package org.xfeep.alaya.orm.jpa;

import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import org.xfeep.asura.core.annotation.Activate;
import org.xfeep.asura.core.annotation.Config;
import org.xfeep.asura.core.annotation.Property;
import org.xfeep.asura.core.annotation.Ref;
import org.xfeep.asura.core.annotation.Service;
import org.xfeep.asura.core.config.ConfigAdminService;
import org.xfeep.asura.core.logger.LoggerService;

@Service
@Config("Xfeep_PersistenceUnitScanner")
public class PersistenceUnitScanner {

	@Property
	String adaptor;
	
	@Property
	Map<String, String> globalProperties = new HashMap<String, String>();
	
	@Ref
	ConfigAdminService configAdminService;
	
	@Ref
	LoggerService loggerService;
	
	
	@Activate
	public void startScan() throws IOException {
		Enumeration<URL> persistencesXmls = Thread.currentThread().getContextClassLoader().getResources("META-INF/persistence.xml");
		if (persistencesXmls != null){
			while (persistencesXmls.hasMoreElements()){
				URL xml = persistencesXmls.nextElement();
				try{
					PersistenceUnitInfoGroup group = PersistenceUnitInfoGroup.parse(xml);
					for (PersistenceUnitInfoImp pi : group.persistenceUnitInfoList){
						pi.getProperties().putAll(globalProperties);
						configAdminService.create("jpa:" + pi.getPersistenceUnitName(), "adaptor", adaptor, "persistenceUnitInfo", pi);
					}
				}catch (Exception e) {
					loggerService.warn("error when parsing " + xml, e);
				}
				
			}
		}
	}
	
}
